LXR uboot/common/spl/spl

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (C) 2011 OMICRON electronics GmbH
   4 *
   5 * based on drivers/mtd/nand/raw/nand_spl_load.c
   6 *
   7 * Copyright (C) 2011
   8 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
   9 */
  10
  11#include <common.h>
  12#include <spi.h>
  13#include <spi_flash.h>
  14#include <errno.h>
  15#include <spl.h>
  16
  17DECLARE_GLOBAL_DATA_PTR;
  18
  19#ifdef CONFIG_SPL_OS_BOOT
  20/*
  21 * Load the kernel, check for a valid header we can parse, and if found load
  22 * the kernel and then device tree.
  23 */
  24static int spi_load_image_os(struct spl_image_info *spl_image,
  25                             struct spi_flash *flash,
  26                             struct image_header *header)
  27{
  28        int err;
  29
  30        /* Read for a header, parse or error out. */
  31        spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS, sizeof(*header),
  32                       (void *)header);
  33
  34        if (image_get_magic(header) != IH_MAGIC)
  35                return -1;
  36
  37        err = spl_parse_image_header(spl_image, header);
  38        if (err)
  39                return err;
  40
  41        spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS,
  42                       spl_image->size, (void *)spl_image->load_addr);
  43
  44        /* Read device tree. */
  45        spi_flash_read(flash, CONFIG_SYS_SPI_ARGS_OFFS,
  46                       CONFIG_SYS_SPI_ARGS_SIZE,
  47                       (void *)CONFIG_SYS_SPL_ARGS_ADDR);
  48
  49        return 0;
  50}
  51#endif
  52
  53static ulong spl_spi_fit_read(struct spl_load_info *load, ulong sector,
  54                              ulong count, void *buf)
  55{
  56        struct spi_flash *flash = load->dev;
  57        ulong ret;
  58
  59        ret = spi_flash_read(flash, sector, count, buf);
  60        if (!ret)
  61                return count;
  62        else
  63                return 0;
  64}
  65/*
  66 * The main entry for SPI booting. It's necessary that SDRAM is already
  67 * configured and available since this code loads the main U-Boot image
  68 * from SPI into SDRAM and starts it from there.
  69 */
  70static int spl_spi_load_image(struct spl_image_info *spl_image,
  71                              struct spl_boot_device *bootdev)
  72{
  73        int err = 0;
  74        unsigned payload_offs = CONFIG_SYS_SPI_U_BOOT_OFFS;
  75        struct spi_flash *flash;
  76        struct image_header *header;
  77
  78        /*
  79         * Load U-Boot image from SPI flash into RAM
  80         * In DM mode: defaults speed and mode will be
  81         * taken from DT when available
  82         */
  83
  84        flash = spi_flash_probe(CONFIG_SF_DEFAULT_BUS,
  85                                CONFIG_SF_DEFAULT_CS,
  86                                CONFIG_SF_DEFAULT_SPEED,
  87                                CONFIG_SF_DEFAULT_MODE);
  88        if (!flash) {
  89                puts("SPI probe failed.\n");
  90                return -ENODEV;
  91        }
  92
  93        header = spl_get_load_buffer(-sizeof(*header), sizeof(*header));
  94
  95#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
  96        payload_offs = fdtdec_get_config_int(gd->fdt_blob,
  97                                             "u-boot,spl-payload-offset",
  98                                             payload_offs);
  99#endif
 100
 101#ifdef CONFIG_SPL_OS_BOOT
 102        if (spl_start_uboot() || spi_load_image_os(spl_image, flash, header))
 103#endif
 104        {
 105                /* Load u-boot, mkimage header is 64 bytes. */
 106                err = spi_flash_read(flash, payload_offs, sizeof(*header),
 107                                     (void *)header);
 108                if (err) {
 109                        debug("%s: Failed to read from SPI flash (err=%d)\n",
 110                              __func__, err);
 111                        return err;
 112                }
 113
 114                if (IS_ENABLED(CONFIG_SPL_LOAD_FIT_FULL) &&
 115                    image_get_magic(header) == FDT_MAGIC) {
 116                        err = spi_flash_read(flash, payload_offs,
 117                                             roundup(fdt_totalsize(header), 4),
 118                                             (void *)CONFIG_SYS_LOAD_ADDR);
 119                        if (err)
 120                                return err;
 121                        err = spl_parse_image_header(spl_image,
 122                                        (struct image_header *)CONFIG_SYS_LOAD_ADDR);
 123                } else if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
 124                           image_get_magic(header) == FDT_MAGIC) {
 125                        struct spl_load_info load;
 126
 127                        debug("Found FIT\n");
 128                        load.dev = flash;
 129                        load.priv = NULL;
 130                        load.filename = NULL;
 131                        load.bl_len = 1;
 132                        load.read = spl_spi_fit_read;
 133                        err = spl_load_simple_fit(spl_image, &load,
 134                                                  payload_offs,
 135                                                  header);
 136                } else {
 137                        err = spl_parse_image_header(spl_image, header);
 138                        if (err)
 139                                return err;
 140                        err = spi_flash_read(flash, payload_offs,
 141                                             spl_image->size,
 142                                             (void *)spl_image->load_addr);
 143                }
 144        }
 145
 146        return err;
 147}
 148/* Use priorty 1 so that boards can override this */
 149SPL_LOAD_IMAGE_METHOD("SPI", 1, BOOT_DEVICE_SPI, spl_spi_load_image);
 150